Dual arch



J. J. POSEY Jan. 20, 1959 DUAL ARCH 2 Sheets-Sheet 1 Filed Aug. 29, 1956//v VE/VTOR. JOSEPH .1. POSEK.

his Attorney.

Jan. 20, 1959 G J. J. POSEY 2,869,488.

DUAL ARCH Filed Aug. 29, 1956 2 Sheets-Sheet 2 //V VE/V 7'0R.' JOSEPH J.POSEY,

his Af/omey.

DUAL ARCH Joseph I. Pusey, Dennra, Pa, assiguor to United States SteelCorporation, a corporation of New Jersey Application August 29, 1956,Serial No. 606,887

2 (Ilaims. (Cl. Mil-99) This invention relates to a structure and moreparticularly to a structure between the checker chambers and cinderpocket in the fan tail section of an open hearth furnace. In thesefurnaces two passageways are arranged side by side with the ceiling ofthe passageways being sprung arches. A single center pier supports thecenter skewbacks for the arches. It is desired to have the area of thepassageways as large as possible and the center pier cuts down this areato a considerable degree. The center pier also requires considerablemaintenance.

It is therefore an object of my invention to provide a supportingstructure for a pair of arches in which the center supporting pier iseliminated.

This and other objects will be more apparent after referring to thefollowing specification and attached draw ings, in which:

Figure 1 is a sectional view of an open hearth furnace incorporating myinvention therein;

Figure 2 is a view taken on the line II-II of Figure 1;

Figure 3 is a view taken on the line III-III of Figure 1;

Figure 4 is a perspective view of the center skew with the arches beingshown by dash-dot lines; and

Figure 5 is a view showing a slight modification of the skew of Figure4.

Referring more particularly to the drawings, reference. numeral 2indicates a checker chamber of an open hearth furnace. A passageway 45leads from the checker chamber 2 to the cinder pocket 6. A structuralsupport 3 is located above the passageway 4. A passageway leads from thecinder pocket 6 upwardly to the main or bath portion 12 of the furnace.The roof of the passageway 4 is formed of two sprung arches 14 and 14'.The

arches 14 and 1e are substantial duplicates so that only one will bedescribed in detail. The arch 14 is formed of a plurality of rings 16made up of refractory bricks. Ten of such rings are shown but it will beunderstood that the number may vary. Skewback blocks the to 18k areprovided for the outer end of the rings 16 and are supported in a wall29. It will be seen that the skewbacks are arranged in a step formationwith the skewbacks increasing in elevation from one end to the otherwith the skewback 18k being at the maximum elevation. A center skew 22supports the inner ends of both arches 14 and 14. Skew 22 slopesupwardly with its lower end being opposite the highest skewback 18k andits highest end opposite the skewback 18a. The skew 22 has asubstantially triangular cross-section at its lower end which mergesinto a substantially trapezoidal crosssection at its upper end, thetrapezoidal section being wider at its top than at its bottom. An I-beam24 extends the length of the skew and is embedded in a cast refractory26. Heat dissipating pins 28 are fastened to the beam 24 as by welding.Lugs 29 and 30 are fastened to opposite ends of the beam 24 as bywelding.

Patented Jan. 2%, 1195?} TQQ The skew 22 may be made unitary as shown inFigure 4 or in two pieces as shown in Figure 5. In the latter case skew22 is separated on a diagonal line 32 forming two sections 34 and 36each having a beam section 24' and 24" embedded therein. The sections24' and 24" have the heat dissipating pins 28 welded thereto and alsolugs 29 and 3%. Additional lugs 38 and 40 are Welded to the adjacentends of beams 24;" and 24".

The structure is constructed as follows: The skewbacks 18a to 18!: arearranged on the piers 2t) and beam 24- is suspended from structure 8 bymeans of suspen sion rods 42 and 44 which engage lugs 29 and 39. A formis then placed around the beam 24 and filled with the cast refractory26. After the cast refractory sets, the form is removed and the rings18:: to 18k are laid up with refractory brick in the ordinary manner.After the arch is completed suspension rod 4% is no longer necessarysince the skew 22 will be held in place at its upper end by means of itskey action. In place of casting the skew 22 in place it may be precastat any convenient location and then positioned by means of lugs 29 and3t and erection rods 42 and 44. The procedure will be the same whenutilizing the two piece skew 22' with additional rods being utilized tosupport the adjacent ends of the skew sections 34 and 36. it will alsobe understood that the same construction may be used regardless ofwhether refractory material or ordinary brick and concrete are used.

While two embodiments of my invention have been shown and described itwill be apparent that other adaptations and modifications may be madewithout departing from the scope of the following claims.

I claim:

1. A structure comprising. two sprung arches arranged side by side intransverse relationship and having a plurality of rings, a skewback forthe outer end of each ring, the skewbacks for each arch decreasing inelevation from one end to the other, a center skew for supporting theinner ends of said rings, said skew sloping upwardly with its lower endopposite the higher ends of the skewbacks, said skew having asubstantially triangular cross-section at its lower end merging into asubstantially trapezoidal cross-section at its upper end, saidtrapezoidal section being wider at the top than at its bottom, and meansfor supporting the lower end of said skew,

2. A structure comprising two sprung arches arranged side by side intransverse relationship and having a plurality of rings a skewback forthe outer end of each ring, the skewbacks'for each arch decreasing inelevation from one end to the other, a center skew for supporting theinner ends of said rings, said skew sloping upwardly with its lower endopposite the higher ends of the skewback, said skew having asubstantially triangular cross-section at its lower end merging into asubstantially trapezoidal cross-section at its upper end, saidtrapezoidal section being wider at the top than at its bottom, a beamextending the length of and embedded in said skew, heat dissipating pinsfastened to said beam, and means for supporting the lower end of saidskew.

References (iited in the file of this patent UNITED STATES PATENTS325,403 Flagler Sept. 1, 1885 1,686,387 Loftus Oct. 2, 1928 1,955,996Wynne et a1. Apr. 24, 1934 2,028,169 Sahlberg Jan. 21, 1936 2,518,352McFeaters Aug. 8, 1950

